Marketplace tested over 20 different masks.
Wearing a mask is critical to reducing the spread of COVID-19, but rigorous tests conducted on behalf of CBC's Marketplace found that while some work very well, others offer little protection from the particles that transmit the novel coronavirus. One type of mask can even spread those particles to others... https://www.cbc.ca/news/canada/marketplace-masks-test-1.5795481?__vfz=medium%3Dsharebar
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